18518351740 has 48 divisors (see below), whose sum is σ = 44452094400. Its totient is φ = 6347999232.

The previous prime is 18518351707. The next prime is 18518351743. The reversal of 18518351740 is 4715381581.

It is a super-2 number, since 2×18518351740² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518351743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200396 + ... + 1215724.

It is an arithmetic number, because the mean of its divisors is an integer number (926085300).

Almost surely, 2^18518351740 is an apocalyptic number.

18518351740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18518351740 is an abundant number, since it is smaller than the sum of its proper divisors (25933742660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18518351740 is a wasteful number, since it uses less digits than its factorization.

18518351740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23974 (or 23972 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 18518351740 in words is "eighteen billion, five hundred eighteen million, three hundred fifty-one thousand, seven hundred forty".